Something called the Oak Processionary Moth has been threatening native English oaks. It will strip the trees and can cause an itchy nose or throat  if you come into contact with it. New Regulations ban the import of certain oak trees into the UK and their movement across the UK. This is part of the Forestry Resilience Strategy, one of the first major action plans to come out of DEFRA's 25 Year Plan. Given that over 1.12m oaks have been imported into England since 2013, this is a major boost to the home grown oak industry.